While working on the article I completely forgot about
mystifying maze which I think is generally better than quicksand. Quicksand is better against aggro but the deck generates a ton of mana that it does not have much to do with it once it dumps its hand. Being able to deal with attackers allows you to keep swinging every turn which is quite useful. Tezzeret is an interesting addition, I am interested to hear how he does in standard without all the nice cheap targets for him to tutor out.
Tezzret actually has screwed me too many times playtesting to keep him in my version of this deck. He costs too much to get out and I generally drew him at the wrong time if I didn't have one of the amazing
Crystal Ball's. I think you could justify taking out the expedition maps when you aren't playing the eldrazzi version of the deck, maybe in favor of something else that could fit? I didn't see much use for them in my games because rarely would fetching one of the two lands help me. Actually if you added Mystifying Maze as a control aspect to the deck the maps would be something I would want 4 of to get that effect on the board as early as possible. If you weren't going to add those though, the map really is just something sitting there collecting dust to power my Master's of Etherium. I think you could find more utility in something that allowed you to gain life. I also thought of an interesting finisher card for the deck since often your monsters don't grow at the same rate as your opponents. Perhaps making a
Sleep a two of or so would allow you to get in those finisher swings I was looking for with Tezzret.
Have you thought about using Steel Overseer, with Voltaic Key.
I had Triskelion with the 2 above in a sealed pool, which turned out really good. Not sure if it would work in constructed though.
Wow yeah he is taking the place of my 3 Tezzret's for sure.
As I said in the comments on the article I dislike needing to have him sit around a turn to be useful. If unanswered the overseer is a beast, especially with voltaic key. The ability to push both juggernaut and lodestone golem out of bolt range is also amazingly useful but not doing anything relevant immediately and being a wretched topdeck makes the overseer less useful. Vikirosen talked about replacing the servitors with them which I don't believe to be the correct move though having three instead of the expedition maps and crystal balls may work better.